Aqueous Hydrochloric Acid Reacts with Magnesium to Produce Hydrogen Gas

question 31

Multiple Choice

Aqueous hydrochloric acid reacts with magnesium to produce hydrogen gas according to the balanced equation below. 2H⁺(aq) + Mg(s) → Mg²⁺(aq) + H₂(g) .If 250.0 mL of 3.00 M HCl is combined with 9.92 g Mg,what volume of hydrogen gas can be produced? Assume the temperature and pressure of the gas are 25°C and 0.988 atm,respectively.(R = 0.0821 L.atm/mol.K)

• A) 4.60 L
• B) 5.05 L
• C) 9.29 L
• D) 10.1 L
• E) 18.6 L

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